Published August 1, 1989
| public
Journal Article
Preparation and electrochemical characterization of conical and hemispherical ultramicroelectrodes
Chicago
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Abstract
We describe a new ultramicroelectrode fabrication technique that has allowed the preparation of conical Pt-Ir ultramicroelectrodes with radii of 0.5-10 µm. These electrodes have been characterized by scanning electron microscopy, cyclic voltammetry, and chronoamperometry. The smallest radii electrodes (r < 2 µm) exhibited dlffusional behavior at times longer than 70 µs in accord with a hemispherical geometry, while larger radii electrodes exhibited dlffusional behavior consistent with a conical geometry. A first-order mathematical approach to diffusion at conical surfaces has been developed to explain these results
Additional Information
© 1989 American Chemical Society. The authors acknowledge the Office of Naval Research, Grant No. N00014-88-K-0482, for support of the research, and N.S.L. acknowledges additional support from the Camille and Henry Dreyfus Foundation Teacher-Scholar Program. This is Contribution No. 7861 from the Division of Chemistry and Chemical Engineering at Caltech.Additional details
- Eprint ID
- 121005
- Resolver ID
- CaltechAUTHORS:20230419-898287000.15
- Office of Naval Research (ONR)
- N00014-88-K-0482
- Camille and Henry Dreyfus Foundation
- Created
-
2023-04-24Created from EPrint's datestamp field
- Updated
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2023-04-24Created from EPrint's last_modified field
- Other Numbering System Name
- Caltech Division of Chemistry and Chemical Engineering
- Other Numbering System Identifier
- 7861